Section Width105 mm (4.1")
Aspect Ratio375%
Rim Diameter42"
Overall Diameter1854 mm (73.0")
Sidewall Height394 mm
Circumference5825 mm
105/375R42 — Buy Tires

Everything to know about the 105/375R42 tire size

Size geometry

A 105/375R42 tire has a 105mm section width and a 375% aspect ratio, mounted on a 42-inch rim. Sidewall height works out to 393.8mm (15.50") and overall outside diameter is 1854.3mm (73.00"). At highway speed the tire completes about 172 revolutions per kilometre — your speedometer and odometer were calibrated against this number.

Direct substitute sizes

If 105/375R42 is unavailable, the closest same-diameter substitutes on the same rim are 95/414R42 and 115/342R42. Both keep your speedometer reading within 1% — safe for daily use, ABS, and stability control. Always verify load and speed ratings before swapping.

Plus / minus sizing options

For a 105/375R42 you can upsize to 115/331R43 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 95/428R41 (minus-one) for a softer ride or winter setup. Both stay inside the Âą3% diameter tolerance that ABS and TPMS systems expect.

Vehicle compatibility

0 vehicles in our database run the 105/375R42 tire size from the factory. Aftermarket fitment depends on rim width, offset, and clearance — match these specs to your wheel before purchasing tires.

Vehicles Using 105/375R42

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